diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2020-11-02 01:01:48 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2020-11-02 01:01:48 +0100 |
| commit | 2063019560c6a3154e6ef0e6e9f24d70c8ba09da (patch) | |
| tree | 85f199f17e11178cc2d7d4141c4510fe0f89d38d /sys/src/cmd/vmx | |
| parent | d75d842cf576cb4785f89c5f5b73a4f73170001b (diff) | |
vmx: mask out bits 0:2 and 24:30 of pci CONFIG_ADDRESS on read
These bits are reserved, and by the specification,
must return zero on read.
This is also used by plan 9 for detecting config mode #1.
Diffstat (limited to 'sys/src/cmd/vmx')
| -rw-r--r-- | sys/src/cmd/vmx/pci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/cmd/vmx/pci.c b/sys/src/cmd/vmx/pci.c index 80dc7aba9..2575f4cec 100644 --- a/sys/src/cmd/vmx/pci.c +++ b/sys/src/cmd/vmx/pci.c @@ -237,7 +237,7 @@ pciio(int isin, u16int port, u32int val, int sz, void *) switch(isin << 16 | port){ case 0x0cf8: cfgaddr = val; return 0; - case 0x10cf8: return cfgaddr; + case 0x10cf8: return cfgaddr & ~0x7f000003; case 0xcfc: case 0xcfd: case 0xcfe: case 0xcff: val <<= 8 * (port & 3); mask = -1UL >> 32 - 8 * sz << 8 * (port & 3); |